06/08/16

Multiply (2x+3)(5x-7)
I'm doing a practice sheet and I think I have the correct answer (confirmed by Mathway too)   10x^2 + x - 21   but the answers on my sheet are   [A] 7x^2 - 6x – 21 [B] 10x^2 + 29x – 21 [C]... more
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06/08/16

How far underground does the parking garage go?
The elevator in a skyscraper goes from the top floor down to the lowest level of the underground parking garage. If the building is 470 feet tall and the elevator descends 530 feet from top to... more
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06/08/16

4sin^2(x) = 3 solve for the identity
Help please
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06/08/16

Solve for the identity: sin^2(x)-3sinx = -2
Hell please
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06/08/16

f(x)=sqrt(4-x^2) ;(1, sqrt(3)) find slope of a tangent line
(Not using derivatives) using formula (f(x)-f(1))/(x-1)
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06/08/16

The length of a rectangle is seven more than triple the width. If the perimeter is 110 inches, find the dimensions
The length of a rectangle is seven more than triple the width. If the perimeter is 110 inches, find the dimensions. i need help i need someone to explain the formula for me because every time i do... more
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06/08/16

Suppose that after 3 hours 70% of the drug remains and also the drug decreases exponentially. How much time elapses until only 25% of the drug remains?
Please help 
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06/08/16

How many times did you ride the roller coaster?
You have 50 tickets, it costs 3 to ride the ferris wheel and 5 for the roller coaster all together you ride 12 times. How many times did you ride the roller coaster?
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06/07/16

a cannonball's initial upward velocity is 128 feet per second. at what times will it be 192 feet above the ground?
need to solve equation using basic factoring methods
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06/07/16

The perimeter of a rectangle lot is 156 meters. The length is twice the width. What is the equation that describes this situation.
it's hard for me to process
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06/07/16

determine the point
1.in quad 2 where the line represented by y=-3x intersect the unit circle
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06/07/16

what is 1.6 divided by ( 8.1 - 4.1 )
i have been stuck on this problem for half a hour and i really need a answer by tomorrow or i fail my homework thats bad 
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06/07/16

Systems of equations
The Miller family and the Baker family each used their sprinklers last summer.The water output rate for the Miller family's sprinkler was 30 L per hour. The water output rate for the Baker family's... more
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06/07/16

750 candles cost $8, 267.10. Soy candles cost $12.77 each specialty candles cost $9.89 each. How many of each type of candles were ordered?
a store ordered 750 candles at acost of $8, 267.10. The soy candles cost $12.77 each and the specialty candles cost $9.89 each. How many of each type of candles were ordered?
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06/07/16

Completing The Squares
7a2 +14a + 86 = 9
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06/07/16

The half-life of a radioactive kind of ruthenium is 1 year. How much will be left after 2 years, if you start with 1,848 grams of it?
Need help   
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06/07/16

A town's population is currently 5,000. If the population doubles every 12 years, what will the population be 48 years from now?
Help me please 
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06/07/16

Solve the equation for t.
The equation models the height h in centimeters after t seconds of a weight attached to the end of a spring that has been stretched and then released. Solve the equation for t.  (pi as in... more
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06/07/16

Given a^2 + b^2 =1 show that ab is more than or equal to -1/2 and less than or equal to 1/2
Given a2 + b2 = 1 show algebraically that -1/2 is less than or equal to ab which is less than or equal to 1/2
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06/06/16

Rewrite the following equation so that y is a function of x
2x+18y=36
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06/06/16

Solving word problems involving angles of elevation, angles and two ladders
a ladder 15.3 meters long can be placed so that it will reach a window on abuilding on one side of the street. at this point it forms a 55 degree with the horizontal. if the ladder is tipped the... more
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06/06/16

How long will it take before they are 360 kilometers apart?
A train leaves little rock Arkansas, and travels north at 65 kilometers per hour. Another train leaves at the same time and travels south at 55 kilometers per hour. How long will it take before... more
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06/06/16

Need help understanding how to solve logarithmic equations for my test tommorrow.
1) 2x =4 3√8   2) 5x=76   3) log31/27=x   4)23x-1=30   thanks it's much appreciated!
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06/06/16

Which one is the cheapest?
The total area of the pool is 9000 + 4500 The floor and the walls of the swimming pool need to be covered with tiles. Decide which of the following companies would be the cheapest:“Everlasting... more
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06/06/16

staci wants to sell her headphones for a 20% profit. she initially bought them for $55. How much profit does you want to meet? What will be the sale price?
 Stacy wants to sell her headphones for a 20% profit. She initially bought  them for $55. How much profit but you want to make? What will be the sale price? 
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